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Apple II RAM?

Submitted by Oelmuvun on February 26, 2007 - 3:06pm. Apple II

I need help identifying something. I got what is in the images below with a bunch of Mac stuff from a woman who said they were "RAM chips from an old Mac". Problem is I don't recall any Macintosh using RAM that was not on a PCB, so, I guess I am thinking they might be from an Apple II but I do not know how to verify it.
Any ideas?

Top:
http://img401.imageshack.us/img401/8307/10021192wl0.jpg

Bottom:
http://img299.imageshack.us/img299/2310/10021202of2.jpg

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david__schmidt's picture

Can't tell from pictures...

Submitted by david__schmidt on February 26, 2007 - 3:28pm.

I can't tell much about the chips themselves from those pictures. I will say from the top view that they look more like ROM chips than RAM. Can you pull one out and photograph that? Let's see the pin arrangement - that can help identify things. The packaging material is not consistent with typical RAM chips I've come across.

But anyway, ever since the Mac Plus, Macs tended to have RAM riding on carriers (i.e. SIMM modules), not soldered in. Here is a picture of RAM chips on the 128k Mac:
http://www.obsoletecomputermuseum.org/mac128/ramchips.jpg

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Oelmuvun's picture

http://img258.imageshack.us/i

Submitted by Oelmuvun on February 26, 2007 - 3:41pm.

http://img258.imageshack.us/img258/5944/10021282vd3.jpg
How is that?

All I know is what I was told by the previous owner and she did not really know ether.

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Eudimorphodon's picture

ROMs

Submitted by Eudimorphodon on February 26, 2007 - 3:44pm.

I'd second the comment that they look to be ROM chips. They have 28 pins, which is a common size for ROM/EPROMs. The early Macs (128/512/Plus) used a pair of them.

If I had to hazard a guess I'd say they could be a set of original 64K firmware chips from a Mac 512 which was upgraded to the 128k ROM set for HFS and double sided floppy support.

--Peace

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david__schmidt's picture

What's on the top?

Submitted by david__schmidt on February 27, 2007 - 2:06pm.

Flip that puppy over and show what's printed on the top. If it's an Apple part number (342-0341-C, 342-0342-B for instance) we will know for sure if it's a ROM.

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